Here's the company site:
Here's the thread on Slashdot from March 20:
http://slashdot.org/article.pl?sid=02/0
Unfortunately, all the company is saying about the key-stroke detection technology is:
VKB has developed a detection method through several proprietary developments for the accurate and reliable detection of user interaction … VKB has filed numerous patents on its core technology and related applications.
I suppose you could go find their patent applications…